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js初学笔记（三）

2016-03-30 20:55 459 查看

函数、判断、链接

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<head>
<script>
function showHide(){
var oDiv = document.getElementById('div1');
if(oDiv.style.display == 'block'){//判断如果是显示的时候隐藏
oDiv.style.display == 'none';
}
else{ //否则显示
oDiv.style.display == 'block';
}
}
</script>
</head>
<body>
<input type = "button" value = "显示隐藏" onclick = "showHide()" />
<div id = "div1">
</div>
</body>
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head>
<body>
<a href="javascript:alert('a');">链接</a>
</body>
</html>
---------------------------------------------------------------------
className 的用法
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
#div1{
width: 100px;
height: 100px;
border: 1px solid black;
}
.box{
background: red;
}
</style>
<script>
function toRed()
{
var oDiv = document.getElementById('div1');
oDiv.className = 'box';
}
</script>
</head>
<body>
<input type="button" value="变红" onclick="toRed()" />
<div id="div1">

</div>
</body>
</html>
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